The Relissarium Wars Books 5-8

From book 5: Team Carbonari must now penetrate the very heart of the Yasta: the main monastery on their home planet. But, to pass as acolytes, they must endure a four day mountain climb... On the trek, they mysteriously start dying, one by one... It must be an inside job, but who would murder their own in the darkness? Will they even make it to the summit?